Re: [PATCH 2/2] configure: Add -Wno-gnu-variable-sized-type-not-at-end

[Richard Henderson]

On 9/8/22 10:09, Daniel P. Berrangé wrote:
> 'kvm_msrs info' is variable in size, so offset of 'entries[1]' is
> undefined by C99. I presume the GNU defined semantics are that the
> variable length 'entries[]' field in 'info' is zero-sized, in order
> to give predictable offset for 'entries[1]' in the local msr_data.

Correct.  I invented this gcc extension for the benefit of glibc, which wanted to append N 
entries to that header, in static storage no less.

I still find it odd that clang warns about a gnu extension when gnu extensions are 
requested via -std=gnu*.


r~